US Bridges

US 30 over US 30/US 93 Interchange

Fair

Twin Falls County, Idaho · US 30/US 93 Junction · Structure no. 000000000013608

Built
1997
28 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
152 ft
1 main span
Daily traffic
11,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over US 30/US 93 Interchange is a prestressed concrete box beam or girders - single or spread carrying US 30 over US 30/US 93 Interchange in Twin Falls County, Idaho. It was built in 1997, so it is 28 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,000 vehicles a day, roughly 4% of them trucks, projected to reach 16,500 by 2042. The structure is 152 ft (46.3 m) long and 74 ft wide.

Location

Open in Google Maps
CarriesUS 30
CrossesUS 30/US 93 Interchange
LocationUS 30/US 93 Junction
RouteU.S. Route 30
CountyTwin Falls County
StateIdaho
Coordinates42.56369, -114.575
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating35.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length152 ft (46.3 m)
Longest span150 ft (45.7 m)
Deck width74 ft (22.6 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2023)
Projected traffic16,500 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 30 over US 30/US 93 Interchange built?

It was built in 1997, making it 28 years old in 2025.

What condition is US 30 over US 30/US 93 Interchange in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does US 30 over US 30/US 93 Interchange carry?

About 11,000 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 30 over US 30/US 93 Interchange?

The structure is 152 ft (46.3 m) long with a longest span of 150 ft (45.7 m) and a deck 74 ft wide.

Who owns US 30 over US 30/US 93 Interchange?

It is owned by the State Highway Agency.